초록 ▼

A combination pressurizing valve (27) and fuel flow divider for a gas turbine is operable in three different fuel distribution modes utilizing three windows which are successively opened to control the flow distribution to the engine atomizing or start-up nozzles (23) and engine air blast or running

A combination pressurizing valve (27) and fuel flow divider for a gas turbine is operable in three different fuel distribution modes utilizing three windows which are successively opened to control the flow distribution to the engine atomizing or start-up nozzles (23) and engine air blast or running nozzles (25) respectively by way of two fixed orifices (51, 55) in a way that satisfies the start-up flow distribution favoring the atomizing nozzles (23) as well as the need for balanced flow distribution between the different types of engine nozzles after a successful start. The first window position corresponds to an engine ignition mode and includes a range of intermediate valve spool (33, 133) positions where one outlet port (57) is open and the other outlet port (67) receives a restricted flow of fuel. The second window position includes a range of valve spool (33, 133) positions where the one outlet port (57) is open and the other outlet port (67) is open to receive a flow of fuel greater than the restricted flow. The third window position corresponds to a full power engine condition and includes a range of valve spool (33, 133) positions including the another extreme position where the one outlet port (57) is open and the other outlet port (67) is open to receive a still further increased flow of fuel.

대표청구항 ▼

[ What is claimed is:] [1.] A pressurizing valve for use in a fuel control system for supplying fuel to an engine, the pressurizing valve having a valve housing including a sidewall inlet port and at least two sidewall outlet ports, one sidewall outlet port adapted to supply start-up fuel to the eng

[ What is claimed is:] [1.] A pressurizing valve for use in a fuel control system for supplying fuel to an engine, the pressurizing valve having a valve housing including a sidewall inlet port and at least two sidewall outlet ports, one sidewall outlet port adapted to supply start-up fuel to the engine and the other sidewall port adapted to supply running fuel to the engine, a movable valve spool disposed within the valve housing for reciprocable motion along an axis, the valve spool having a hollow spool interior and having one extreme position where both sidewall outlet ports are closed to prevent fuel flow to the engine and another extreme position where both sidewall outlet ports are open for full fuel flow from the inlet port through the hollow spool interior and out both outlet ports to the engine, the valve housing being closed at each end by an endwall, one endwall including an annular seal for engaging one end of the valve spool to prevent fuel from entering the hollow spool interior from the sidewall inlet port when the valve spool is in said one extreme position.